GMW GMW14754 PDF

This specification covers the materials and performance of elastomeric o-rings, used for quick connector fittings for fuel systems lines. Quick connectors contain two different o-rings, one for reduction of fuel permeation (Type A, C, E or G) and one for cold resistance properties (generally Type B for liquid fuel applications, Type D for fuel vapor applications). If no type designation is given on the blueprint or in the math data, the o-rings required to be used must be one of Type A and one of Type B.

Material Description. Materials covered by this specification are divided into seven types:

Type A. Fluorosilicone Rubber/Fluorocarbon Rubber (FVMQ/FKM) Color Code: brown.

Type B. FVMQ Color Code: yellow.

Type C. FVMQ/FKM Optional FKM Color Code: black. The material of this o-ring must meet the conductivity requirement of Table 1 (Volume Resistance).

Type D. Hydrogenated Nitrile Butadiene Rubber (HNBR) Color Code: red brown. This type of o-ring is only to be used for fuel vapor line connections which are outside of the engine compartment.

Type E. FKM Color Code: green.

Type F. Drawing defined (e.g., using SAE J200 or ASTM D2000 line callout).

Type G. FKM, Low Durometer, and Low Tensile Modulus.

Symbols. Not applicable.

Typical Applications.Not applicable.

Remarks. Not applicable.